@import 'default-theme';
@import 'mixins';
@import 'variables';

$md-input-floating-placeholder-scale-factor: 0.75 !default;

// Placeholder colors. Required is used for the `*` star shown in the placeholder.
$md-input-placeholder-color: md-color($md-foreground, hint-text);
$md-input-floating-placeholder-color: md-color($md-primary);
$md-input-required-placeholder-color: md-color($md-accent);

// Underline colors.
$md-input-underline-color: md-color($md-foreground, hint-text);
$md-input-underline-color-accent: md-color($md-accent);
$md-input-underline-color-warn: md-color($md-warn);
$md-input-underline-disabled-color: md-color($md-foreground, hint-text);
$md-input-underline-focused-color: md-color($md-primary);

// Gradient for showing the dashed line when the input is disabled.
$md-input-underline-disabled-background-image: linear-gradient(to right,
        rgba(0, 0, 0, 0.26) 0%, rgba(0, 0, 0, 0.26) 33%, transparent 0%);

/**
 * Undo the red box-shadow glow added by Firefox on invalid inputs.
 * See https://developer.mozilla.org/en-US/docs/Web/CSS/:-moz-ui-invalid
 */
:-moz-ui-invalid {
  box-shadow: none;
}

/**
 * Applies a floating placeholder above the input itself.
 */
@mixin md-input-placeholder-floating {
  display: block;
  padding-bottom: 5px;
  transform: translateY(-100%) scale($md-input-floating-placeholder-scale-factor);
  width: 100% / $md-input-floating-placeholder-scale-factor;

  .md-placeholder-required {
    color: $md-input-required-placeholder-color;
  }
}

:host {
  display: inline-block;
  position: relative;
  font-family: $md-font-family;
  overflow: hidden;

  // To avoid problems with text-align.
  text-align: left;

  // Global wrapper. We need to apply margin to the element for spacing, but
  // cannot apply it to the host element directly.
  .md-input-wrapper {
    margin: 16px 0;
  }

  // We use a table layout to baseline align the prefix and suffix classes.
  // The underline is outside of it so it can cover all of the elements under
  // this table.
  // Flex does not respect the baseline. What we really want is akin to a table
  // as want an inline-block where elements don't wrap.
  .md-input-table {
    display: inline-table;
    flex-flow: column;
    vertical-align: bottom;
    width: 100%;

    & > * {
      display: table-cell;
    }
  }

  // The Input element proper.
  .md-input-element {
    // Font needs to be inherited, because by default <input> has a system font.
    font: inherit;

    // The Material input should match whatever background it is above.
    background: transparent;

    // By default, <input> has a padding, border, outline and a default width.
    border: none;
    outline: none;
    padding: 0;
    width: 100%;

    &.md-end {
      text-align: right;
    }
  }

  .md-input-infix {
    position: relative;
  }

  // The placeholder label. This is invisible unless it is. The logic to show it is
  // basically `empty || (float && (!empty || focused))`. Float is dependent on the
  // `floatingPlaceholder` input.
  .md-input-placeholder {
    // The placeholder is after the <input>, but needs to be aligned top-left of the
    // infix <div>.
    position: absolute;
    left: 0;
    top: 0;

    font-size: 100%;
    pointer-events: none;  // We shouldn't catch mouse events (let them through).
    color: $md-input-placeholder-color;
    z-index: 1;

    // Put ellipsis text overflow.
    width: 100%;
    display: none;
    white-space: nowrap;
    text-overflow: ellipsis;
    overflow-x: hidden;

    transform: translateY(0);
    transform-origin: bottom left;
    transition: transform $swift-ease-out-duration $swift-ease-out-timing-function,
                scale $swift-ease-out-duration $swift-ease-out-timing-function,
                color $swift-ease-out-duration $swift-ease-out-timing-function,
                width $swift-ease-out-duration $swift-ease-out-timing-function;

    &.md-empty {
      display: block;
      cursor: text;
    }

    // Show the placeholder above the input when it's not empty, or focused.
    &.md-float:not(.md-empty), &.md-float.md-focused {
      @include md-input-placeholder-floating;
    }

    // :focus is applied to the input, but we apply md-focused to the other elements
    // that need to listen to it.
    &.md-focused {
      color: $md-input-floating-placeholder-color;

      &.md-accent {
        color: $md-input-underline-color-accent;
      }
      &.md-warn {
        color: $md-input-underline-color-warn;
      }
    }
  }

  // Pseudo-class for Chrome and Safari auto-fill to move the placeholder to
  // the floating position. This is necessary because these browsers do not actually
  // fire any events when a form auto-fill is occurring.
  // Once the autofill is committed, a change event happen and the regular md-input
  // classes take over to fulfill this behaviour.
  input:-webkit-autofill + .md-input-placeholder {
    @include md-input-placeholder-floating;
  }

  // The underline is what's shown under the input, its prefix and its suffix.
  // The ripple is the blue animation coming on top of it.
  .md-input-underline {
    position: absolute;
    height: 1px;
    width: 100%;
    margin-top: 4px;
    border-top: 1px solid $md-input-underline-color;

    &.md-disabled {
      border-top: 0;
      background-image: $md-input-underline-disabled-background-image;
      background-position: 0;
      background-size: 4px 1px;
      background-repeat: repeat-x;
    }

    .md-input-ripple {
      position: absolute;
      height: 2px;
      z-index: 1;
      background-color: $md-input-underline-focused-color;
      top: -1px;
      width: 100%;
      transform-origin: top;
      opacity: 0;
      transform: scaleY(0);
      transition: transform $swift-ease-out-duration $swift-ease-out-timing-function,
                  opacity $swift-ease-out-duration $swift-ease-out-timing-function;

      &.md-accent {
        background-color: $md-input-underline-color-accent;
      }
      &.md-warn {
        background-color: $md-input-underline-color-warn;
      }

      &.md-focused {
        opacity: 1;
        transform: scaleY(1);
      }
    }
  }

  // The hint is shown below the underline. There can be more than one; one at the start
  // and one at the end.
  .md-hint {
    position: absolute;
    font-size: 75%;
    bottom: -0.5em;

    &.md-right {
      right: 0;
    }
  }
}


// RTL support.
:host-context([dir='rtl']) {
  text-align: right;

  .md-input-placeholder {
    transform-origin: bottom right;
  }

  .md-input-element.md-end {
    text-align: left;
  }

  .md-hint {
    right: 0;
    left: auto;

    &.md-right {
      right: auto;
      left: 0;
    }
  }
}
